PACCAR is recalling certain model year 2013 Kenworth T680 vehicles, manufactured from November 29, 2012, through December 6, 2012; and model year 2013 Peterbilt 579 and 567 vehicles, manufactured from August 28, 2012, through December 31, 2012. These vehicles were equipped with the air suspension dump valve option. New software may cause the rear air suspension to re-inflate without warning when the operator turns the ignition key to the “off” position.
